This statement defines the function mapping READ_NOS_json_fm for the READ_NOS table operator to query JSON data files. The function mapping includes the authorization DefAuth and a return type of NOSREAD_RECORD.
CREATE FUNCTION MAPPING READ_NOS_json_fm FOR READ_NOS EXTERNAL SECURITY DEFINER TRUSTED DefAuth USING LOCATION('/S3/td-usgs-public.s3.amazonaws.com/JSONDATA'), RETURNTYPE('NOSREAD_RECORD') ;